Furnace



No. 622,5l9. Patented Apr. 4, I899.

w. fiicOLAVE.

summons.

(Application filed Sept. 19 189B.) (No Modal.) 4 Sheets-Shaet l.

INVENTOR WITNESSES ma NORRIS PEYERS cu. Puoraumo. wAsmNuroN, u. c.

Patented Apr. 4, I899.

4 Sheets-Shoal.

lNVENTOZI?7 W. McCLAVE.

No. 622,5l9.

F U B N A C E.

(Application filed Sept. 12, 1898.)

{No Model.)

WITNESSES m: nonms Paws co, PHDTG-LIYHQ, WASNVNGYON, a. c

Patented Apr. 4,1899. W MGCLAVE.

F U R N A 6 E.

(Application flle Sept. 12, 1898.)

4 Shear-Sheet 8.

(No Model.)

- INVENTOH Patented Apr. 4, I899.

w. McCLAVE.

FU R N A G E.

(Application filed Sept. 12, 189B.)

4 Sheets-Sheet 4.

(No Model.)

' INVENTOH:

WITNESSES THE mama wzrzns co, PHDYCLLITMO. wAsuwemN, u. c,

PATEN heron,

\VILLIAM MOOLAYE, OF SCRANTON, PENNSYLVANIA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 622,519, dated April 4, 1899.

I Original application filed May 10, 1898, Serial No. 680,272. Divided and this application filed September 12, 1898. Serial No. 690,790. (No model.)

T aZZ whom it may concern:

Be it known that 1, WILLIAM MOCLAVE, a citizen of the United States, residing at-Scranton, in the county ofLackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Furnaces; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnaces and mechanical stokers therefor; and it consists of a furnace having an inclined grate and a feed-hopper having a curved bottom which extends to the front wall of the furnace and a pivoted oscillating pusher which moves in an arc and fits the curved bottom of the hopper, the front end of which pusher comes in direct contact with the fuel and pushes the same directly onto the upper end of the grate, and means for oscillating the pusher.

It also consists in the combination, with a furnace having an inclined grate, of a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the underbottom,an oscillating curved pusher ;adapted to recede between the two bottoms, the rear end of the pusher on its rearward stroke coming in direct contact with the fuel and pushing or forcing the fuel to the upper end of the grate, and-means for oscillating the pusher.

It also consists of a furnace having an inclined grate and a feed-hopper having a curved bottom and a pivoted oscillating pusher which moves in an arc and fits the curved bottom of the hopper, the front end of which comes in direct contact with the fuel and pushes the same onto the upper end of the grate, mechanical means for oscillating the pusher, and means for varying the movement of the pusher.

It also consists of a furnace having an inclined grate and a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an os cillating curved pusher adapted to recede be tween the two bottoms, the rear edge of the pusher on its rearward stroke pushing or forcing the fuel onto the upper end of the grate,automatic means for oscillating the pusher, and means for quickly disconnecting the pusher from a power-shaft.

In the accompanying drawings,Figure 1 rep resents alongitudinal vertical section through a furnace constructed in accordance with my invention. Fig. 2 represents a front elevation of a portion of the same,parts being shown in section to better reveal the construction. Fig. 3 represents a detail side elevation of the end of the hopper, showing the bars for op erating the pivoted pusher mounted therein. Fig. 4 represents a detail fragmentary elevation looking toward the front of the furnace and showing the dead-plate and the lower part of the hopper. detail view of the operating-levers for moving the pusher in the hopper. Fig. 6 represents an enlarged detail elevation of the same, looking at the edges of thelevers. Fig. 7 rep resents a detail perspective view of a portion of the pusher which operates in the feed-hop per. Figs. 8 and 9 represent detail views illus trating the slides employed in connection with the operating-levers for moving the pusher in the hopper.

In the accompanying drawings, 1 represents a furnace; 2, my improved hopper; 3, an inclined grate; 4, a movable floor, and an ashpit.

I make no claim under this application to the specific construction of the grate and the means for operating the same, as the same are fully described and claimed in an applica tion filed by me on the 10th day of May, 1898, and designated by serial number 680,272, of which this application is a division, nor to the movable floor, as the same is also fully (le scribed and claimed in a divisional application filed by me on the 12th day of September, 1898, and designated by serial number 690,789.

, The hopper 2 is mounted, preferably, upon the outside of the front 6 of the furnace above the doors leading into the ash-pit. The hopper is preferably an elongated receptacle ex:

Fig. 5 represents an enlarged vent the chance of warping.

tending practically the full wid th of the grate and provided with a curved lower bottom 8, which leads directly to the top of the deadplate 7, which is interposed between the up per grate-bar and the front of the furnace, and an upper bottom 9, the rear edge of which terminates considerably forward of the rear edge of the lower bottom, the said inner bottom being shorter than the lower bottom, the front wall 6 being cut out above the said deadplate to form an opening for the admission of the fuel to the grate, as at 10.

A radially-moving pusher, as 1 1, is mounted interiorly of the hopper and carried by arms, as 12,'pivoted to the ends of the hopper, as at 13. The body portion of the pusher 11 is preferably formed of a hollow metallic section which is segmental in form, so as to conform to the curvature of the inner surfaces of the bottoms of the hopper, the arms 12 being so pivoted as to cause the pusher 11 to travel in a curved path just above the inner face of the lower bottom and in close proximity to the under side of the rear edge of the upper bottom. Linings or false ends, as 14, are mounted in the said hopper and adapted to receive the pusher-arms 12 between them and the end walls proper of the hopper. The space between the two bottoms and the inner and outer ends of the hopper is preferably closed at the top, which practicallypre vents the coal from getting behind the pusher and its arms, and the whole construction allows the said coal or fuel to drop down in front of the pusher when the said pusher recedes into the space formed between the upper and lower bottoms. The rear edge of the pusher 11, which engages the fuel, is preferably formed with a series of recesses or slots 15 in its edge, so as to present a broken line of metal to the heat of the furnace and pre- These slots may be closed by securing small pieces of metal to the under surface of the pusher, the said pieces being only secured at one edge, so as to permit of the expansion and contraction of the pusher. The pieces will serve to prevent fuel getting inside of and beneath the pusher. When the pusher is in its lower position, it is adapted to extend partly through an opening 10, and when in this position practically cuts off the flow'of fuel through the same. This is a valuable feature, as when it is desired to drop the fire entirely from the grate the pusher can be brought into this position, so as to prevent further feeding of the fuel at the upper end of the grate. In order to oscillate the pusher, a pivoted stud 16, which is connected to one of the arms 12, is secured to an exterior arm, as 17 the said arm extending in a general direction toward a rock-shaft 18 and being provided with a longitudinal slot, as 19. An arm, as 20, is firmly secured to the shaft 18 and extends in a direction to meet the arm 17 the said arm 20 also being provided with a longitudinal slot 21. In order to connect the arms, slides are mounted in the slots 19 and 21. One slide, as 22, is formed with a body portion and one flange, as 23, a separate plate, as 2%, being adapted to be secured to the said slide upon the other side of the arm 20 to form a second flange to assist in holding the slide in the slot 21. It will be apparent that by this construction the slide can easily be mounted in the slot 21. The flange of plate 24 maybe secured to the body portion of the slide by screws, as shown in Figs. 8 and 9 of the drawings, or in any other suitable manner. A slide 25, similar to the slide 24, is mounted in the slot 19; but this slide is also provided with a projecting lug, as 26, having a screw-threaded aperture, as 27, the said screw being mounted in' suitable bearings, as 28 28, upon one side of the arms 17. The screw 27 is provided at any point along its length, preferably at the top, with an enlargement, as 29, having sockets or recesses 30 formed in its periphery, adapted to receive a turning pin or rod. It will be apparent that by turning the screw 27 the slide 25 may be adjusted to any height in the slot 19, the slide 22, which is connected thereto, assuming a corresponding position in the slot 21 of the arm 20. In order to pivotally connect the slide 25 with the slide 22, a removable pivot-pin, as 31, is passed through openings or bearings formed in the two slides. A boss 32 is formed upon the under side of the slide 22 and carries a pin, as 33, which is adapted to extend into and engage an annular groove 34:, formed upon the pivot-pin 31. When the pivot-pin is put in place, as shown in Fig. 6 of the drawings, the rocking pin 33 engages the annular groove 34 and prevents the said pivotpin from becoming disengaged or sliding out of place. When it is desired to take the pin out, so as to separate the arms 20 and 17, it is merely necessary to lift the pin 33, when the pin 31 maybe withdrawn. This is desirable when it is necessary to stop the feed of the fuel from the hopper. It will be apparent that the pusher, through the medium of the arm 17, receives its oscillating movement from the shaft 18 through the medium of the arm 20. It will also be seen that by the adjustment of the slides 22 and 25 the throw of the arm 17 and the pusher actuated thereby can be regulated as may be desired. the slide 22 is near the outer end of the arm 20, the pusher will have the greatest range of movem ent,whereas when the slides are drawn toward the rock-shaft 18 the movement of the pusher will be correspondingly lessened. When it is desired to stop the feed from the hopper upon the grate quickly, as when the fire is to be dumped, the pin 31 may be quickly pulled out, as above described, and the pusher brought to its lowest position, so as to extend partially through the opening 15, when the feed of the fuel will cease. When it is desired to operate the hopper again, all that it is nechen essary to do is to join the slides 22 and 25 by 37. The tension of the spring may be adjusted by means of a support-ing screw-rod, as 38.

, The spring will preferably never be of such strength as to completely balance the pusher, a slight preponderance of weight being allowed to said pusher, so that it will have a tendency to fall if not engaged with the operating means. The fuel is fed by hand or any other suitable means into the upper open mouth of the hopper.

Having now described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. In a furnace, the combination of an inclined grate, and a hopper having a curved bottom, which extends to the front wall of the furnace, and a pivoted oscillating pusher, which moves in an arc and fits the curved bottom of the hopper, the front end of which pusher comes in direct contact with the fuel to push or force the same directly onto the upper end of the grate, and means for oscillating the pusher.

2. In a furnace, the combination of an inclined grate, a hopper having two curved bottoms with aspace between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an oscillatin g curved pusher adapted to recede between the two bottoms, the rear edge of the pusher on its rearward stroke coming in direct contact with the fuel for pushing or forcing the fuel onto the upper end of the grate, and means for oscillating the pusher.

3. In a furnace, the combination of an inclined grate, a hopper having two curved bottoms wit-h a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an 'oscillating curved pusher adapted to recede between the two bottoms, the rear edge of the pusher on its rearward stroke coming in direct contact with the fuel for forcing or pushing the same onto the upper end of the grate, automatic means for oscillating the pusher, and-means for varying the movement of the pusher.

4. In a furnace, the combination of an inclined grate, a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of thelower edge of the under bottom, an oscillatin g curved pusher adapted to recede betweenthe two bottoms, the rear edge. of the pusher on its rearward stroke pushing or forcing the fuel onto the upper end of the grate, automatic means for oscillating the pusher, and means for quickly disconnecting the pusher from a power-shaft.

5. In a furnace, the combination of an inclined'grate, a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an oscillating curved pusher which operates between the two bottoms, the rear edge of the pusher on its rearward stroke pushing or forcing the fuel onto the upper end of the grate, automatic means for oscillating the pusher, and means for varying the movement of the pusher, said means comprising two arms, each of which is provided with an elongated slot, and means for connecting the arms together to allow of their adjustment with respect to each other. I

6. In a furnace, the combination of an inclined grate, a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an oscillating curved pusher adapted to recede between the two bottoms, the rear edge of the pusher on its rearward stroke forcing or pushing the fuel onto the upper end of the grate, automatic means for oscillating the pusher, means for varying the movement of the pusher, said means comprising two arms, each of which is provided with an elongated slot, and means for connecting the arms together to allow of their adjustment with respect to each other, said means comprising two slides arranged on the slotted arms and connected by a pivot-pin, which passes through a screw threaded lug or projection on one of the slides whereby upon turning the screw the movement of the pusher will be varied.

7. Ina furnace, the combination of an inclined grate and a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an oscillating curved pusher adapted to recede between the two bottoms,'the rear edge of the pusher on its rearward stroke pushing or foreing the fuel onto the upper end of the grate, automatic means for oscillating the pusher, and means for quickly disconnecting the pusher from a power-shaft, said means comprising two arms each of which is provided with an elongated slot, and a pin for pivotally connecting the arms together, which pin is quickly removable.

8. In a furnace, the combination of an inclined grate and a hopper provided with a pusher, the rear edge of which is recessed or slotted at short intervals, the recesses or slots extending vertically through the pusher and a considerable distance forward to form short or broken lines of metal to prevent warping when coming in contact with the heated fuel.

9. In a furnace, the combination of an inclined grate, and a hopper having two curved bottoms with a space between them, the lower edge of the upper bottom terminating forward of the lower edge of the under bottom, an oscillating curved pusher which operates IIO In testimony whereof I hereunto affix my signature in presence of two witnesses.

WVILLIAM MCCLAVE.

Vitnesses:

JOHN J HURLEY, JOHN P. BUTLER. 

